Multiplayer online battle arena (MOBA), also known as action real-time strategy (ARTS) or Hero Brawler, is a sub-genre of the real-time strategy (RTS) genre of video games, in which often two teams of players compete with each other in discrete games, with each player controlling a single character through an RTS-style interface. It differs from traditional RTS games in that there is no unit construction and players control just one character. In this sense, it is a fusion of action games and real-time strategy games. The genre emphasizes cooperative team-play; players select and control one "hero", a powerful unit with various abilities and advantages to form a team's overall strategy. The objective is to destroy the opponents' main structure with the assistance of periodicallyspawned computer-controlled units that march towards the enemy's main structure via paths referred to as "lanes".

Gameplay[edit]
There are two opposing teams whose goal collectively as a team is generally to destroy their enemy's base to win,[24] though some games have the option of different victory conditions.[25] Typically, there is one main structure which must be destroyed to win, though destroying other structures within the opposing team's base may confer other benefits. Defensive structures are in place to prevent this, as well as relatively weak computer-controlled units which periodically spawn at each base and travel down predefined paths toward the opposing team's base.[26]

A player controls a single powerful in-game unit generally called a 'hero'. When a hero stands near a killed enemy unit or kills an enemy unit, it gains experience points which allow the hero to level up. When a hero levels up, they have the ability to learn more powerful skills and abilities. When a hero dies, they have to wait a designated time, which generally increases as they level up, until they revive at their base.[27]

Each player receives a small amount of gold per second from their base. Moderate amounts of gold are rewarded for killing hostile computer-controlled units and larger amounts are rewarded for killing enemy heroes. Gold is used by heroes to buy a variety of different items that range in price and impact. For the most part, this involves improving the combat viability of the hero, although there may be other items that support the hero or team as a whole in different ways.[28]

As the heroes of each team get stronger, they can use multiple strategies to gain an advantage. These strategies can include securing objectives, killing enemy heroes and farming gold by killing A.I. units. The stronger a team gets, the more capable they are at destroying the enemy team and their base.

Members of the genre do not generally feature several other elements traditionally found in real-time strategy games, notably base management, and army building. Some video games have certain heroes which control a few specialized units. The RPG genre has a much closer resemblance to the gameplay, only limited to an arena.